Unique CO2-switched cellulose solution properties in the CO2/DBU/DMSO solvent system and the preparation of regenerated materials
文献类型：期刊论文
| 作者 | Zhang, Lihua; Shi, Wentao; Sheng, Hailiang; Feng, Song; Yao, Minglong; Chen, Peng ; Zheng, Qiang; Xie, Haibo
|
| 刊名 | GREEN CHEMISTRY
 |
| 出版日期 | 2021 |
| 卷号 | 23期号:16页码:5856-5865 |
| 关键词 | IONIC-LIQUID RHEOLOGICAL PROPERTIES POTENTIAL APPLICATION PHYSICAL-PROPERTIES MOLECULAR-WEIGHT DISSOLUTION TEMPERATURE BEHAVIOR FILMS AEROGELS |
| 英文摘要 | The reaction of cellulose with CO2 in the presence of various organic superbases resulted in a novel CO2 derivative dissolution strategy for cellulose, presenting a special solvent system for cellulose dissolution processing and derivatization. The properties of the cellulose solution are important for the preparation of particular regenerated materials via dissolution processing. Herein, properties of the cellulose solution in a CO2/1.8-diazabicyclo[5.4.0]undec-7-ene/dimethyl sulfoxide (CO2/DBU/DMSO) solvent system were first systematically studied, and it was found that the apparent viscosities of cellulose solutions were highly dependent on the cellulose type, concentration and temperature. The overlap concentrations (c*) were determined to be 2 and 0.6 wt% for the microcrystalline cellulose (MCC) and wood pulp solutions, respectively. The Cox-Merz rule was valid for cellulose solutions in the CO2/DBU/DMSO solvent system. Furthermore, taking advantage of the reversible chemistry of CO2 in this solvent system, a reversible CO2-controlled sol-gel transition of the newly achieved cellulose solution in CO2/DBU/DMSO was identified by dynamic rheology of measuring the temperature dependence of storage modulus (G ') and loss modulus (G ''). Furthermore, the interesting CO2-controlled sol-gel transition was developed via integrated thermal-induced CO2 release and anti-solvent extraction for the preparation of regenerated cellulosic gel materials and then cellulose films with a tensile strength of 44.3 MPa. Interestingly, it was found that the regenerated cellulose through this approach turned out to be a cellulose IVI crystalline structure. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21759]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | Xie, HB (corresponding author), Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Zhang, Lihua,Shi, Wentao,Sheng, Hailiang,et al. Unique CO2-switched cellulose solution properties in the CO2/DBU/DMSO solvent system and the preparation of regenerated materials[J]. GREEN CHEMISTRY,2021,23(16):5856-5865. |
| APA | Zhang, Lihua.,Shi, Wentao.,Sheng, Hailiang.,Feng, Song.,Yao, Minglong.,...&Xie, Haibo.(2021).Unique CO2-switched cellulose solution properties in the CO2/DBU/DMSO solvent system and the preparation of regenerated materials.GREEN CHEMISTRY,23(16),5856-5865. |
| MLA | Zhang, Lihua,et al."Unique CO2-switched cellulose solution properties in the CO2/DBU/DMSO solvent system and the preparation of regenerated materials".GREEN CHEMISTRY 23.16(2021):5856-5865. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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